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Rearrangement of 2,2-disubstituted cyclohexane-1,3-diones in polyphosphoric acid

✍ Scribed by A.M. Chalmers; A.J. Baker

Publisher
Elsevier Science
Year
1974
Tongue
French
Weight
201 KB
Volume
15
Category
Article
ISSN
0040-4039

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✦ Synopsis

Current interest"3 in the Robinson-Mannich annelation of cyclohexane-l,j-dione prompts us to report an aspect of acid catalyeed reactions of 2,2-disubetituted cyolohexane-l,Jdiones using polyphoephoric acid4.

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## Abstract The title condensations gave respectively: __gem__‐bisarylated cyclic amines **3a–k** or monoarylated unsaturated cyclic amines **4a–g**, 1,3‐bisarylated cyclohexadienes **6a**, **6b**, the condensed bicyclo [2,2,2]‐octane **8**. In addition the aromatic ketone **9** gave the fluorenone